Inheritance Tax on £750,000 Estate UK: How Much IHT, All Scenarios, and Ways to Reduce It (2026)
A single person with a £750k estate could pay £100k in IHT — or nothing. A widowed person or couple with £750k can usually achieve £0 IHT using four combined thresholds worth £1m, but only if the tNRB and tRNRB are actively claimed and the will is structured correctly.
| Scenario | Combined Threshold | Chargeable | IHT Payable | Key Notes |
|---|---|---|---|---|
| Single person — £750k estate — home passes to direct descendants | NRB £325k + RNRB £175k = £500,000 | £250,000 | £100,000 (40% × £250k) | RNRB (s8D IHTA) available if qualifying home (any home deceased lived in at some point) passes to children, grandchildren, or step-children. Home can pass directly by will or via an IPDI trust (s8H IHTA). Must claim IHT435 — NOT automatic. |
| Single person — £750k estate — home does NOT pass to direct descendants (discretionary trust, sibling, friend) | NRB £325k only (no RNRB) | £425,000 | £170,000 (40% × £425k) | RNRB lost if home passes to a discretionary trust (even if children are discretionary beneficiaries), sibling, friend, charity, or non-direct-descendant. Loss of RNRB = £70k more IHT vs scenario 1 above. Review will structure — direct gifts to children or IPDI life interest trust preserve the RNRB. |
| Widowed person — £750k estate — all 4 thresholds available AND home to direct descendants | NRB £325k + tNRB £325k + RNRB £175k + tRNRB £175k = £1,000,000 combined threshold | £0 (£750k < £1m threshold) | £0 | tNRB (s8A IHTA) requires first spouse's NRB to have been unused (or partially unused) at their death. tNRB claim: IHT402 — NOT automatic; 2yr deadline from end of tax year of second death. tRNRB (s8G IHTA): IHT436 — NOT automatic; same deadline. Both must be actively claimed. A £750k estate for a widowed person with all 4 thresholds = £0 IHT. |
| Widowed person — £750k estate — tNRB available but NO tRNRB (first spouse's RNRB was used) AND home to direct descendants | NRB £325k + tNRB £325k + RNRB £175k = £825,000 | £0 (£750k < £825k) | £0 | Even if the first spouse's RNRB was partly used (e.g., first spouse left a home to the children = RNRB used), the surviving spouse's own NRB (£325k) + tNRB (£325k) + RNRB (£175k) = £825k still covers a £750k estate. The tRNRB being zero or partial does not prevent IHT = £0 here because the 3 available thresholds alone cover £750k. |
| Married couple — £750k total estate — first death (everything to surviving spouse) | Unlimited spousal exemption (s18 IHTA) | £0 | £0 IHT on first death | First death: all to spouse = unlimited s18 spousal exemption; £0 IHT regardless of value. First spouse's full NRB (£325k) and RNRB (£175k) preserved as transferable thresholds for use on the surviving spouse's second death. |
| Married couple — £750k total estate — second death (surviving spouse; tNRB and tRNRB available) | NRB £325k + tNRB £325k + RNRB £175k + tRNRB £175k = £1,000,000 combined threshold | £0 (£750k < £1m) | £0 — IF tNRB and tRNRB actively claimed on IHT402 and IHT436 | The £750k estate of the surviving spouse is covered by the combined £1m threshold. Key: (1) first death must have been all to spouse (preserving 100% tNRB and 100% tRNRB); (2) IHT402 and IHT436 must both be submitted — NOT automatic; (3) home must pass to direct descendants under the surviving spouse's will (for RNRB and tRNRB to apply). A correctly structured will + correct executor claims = £0 IHT on £750k. |
| Single person — £750k estate — 36% charitable legacy rate (s36 IHTA) | NRB £325k + RNRB £175k = £500k (baseline = £250k) | £250k baseline; after £25k to charity = £225k at 36% | £81,000 (36% × £225k) — saving £19k vs 40% rate | s36 IHTA 1984 (Finance Act 2012): IHT rate falls from 40% to 36% if ≥10% of the baseline amount passes to qualifying charities. Baseline = net estate − NRB − RNRB − other exemptions. 10% of £250k baseline = £25k to charity triggers 36% rate. Family net cost of giving £25k to charity: £25k − £19k saving = £6k (HMRC pays 76% of the donation). |
IHT 2026-27: 40% on chargeable estate above threshold; 36% if ≥10% of baseline to qualifying charity (s36 IHTA 1984). NRB: s8C IHTA 1984 — £325,000; frozen to at least 2030. RNRB: s8D IHTA 1984 — £175,000; qualifying residential interest (QRI) closely inherited by direct descendants (s8K IHTA); claim IHT435 — NOT automatic. tNRB: s8A IHTA 1984 — up to 100% of first spouse/CP's unused NRB; claim IHT402 — NOT automatic; 2yr deadline from end of tax year of second death. tRNRB: s8G IHTA 1984 — up to 100% of first spouse/CP's unused RNRB; claim IHT436 — NOT automatic; same 2yr deadline. RNRB taper: s8E IHTA — only above £2m adjusted net estate; not applicable to £750k estate. Spousal exemption: s18 IHTA — unlimited; first death all to UK-domiciled spouse = £0 IHT. NRB discretionary trust: in older wills pre-2007 — uses first NRB; reduces tNRB on second death; review urgently. Deed of variation: s142 IHTA 1984 — within 2yr of death; can redirect NRB trust to spouse; restore tNRB. IPDI trust: s49A IHTA; QIP (s49(1)); RNRB available via IPDI (s8H IHTA). Discretionary trust: RNRB LOST. PETs: s3A IHTA — 7yr clock. Annual exemption: s19 IHTA — £3k/yr. Normal expenditure from income: s21 IHTA — uncapped; immediate. AIM BPR: s105(1)(bb) IHTA — 100% after 2yr; £1m cap from April 2026 (Finance Act 2026).
IHT on a £750k Estate: Complete Guide
IHT on a £750k estate — the headline numbers
A £750,000 estate produces very different IHT outcomes depending on who the beneficiaries are and what thresholds are available. The two key thresholds in 2026-27: the Nil Rate Band (NRB — s8C IHTA 1984) at £325,000 (frozen to at least 2030), and the Residence Nil Rate Band (RNRB — s8D IHTA 1984) at £175,000 — available when a qualifying home passes to direct descendants (children, grandchildren, step-children — s8K IHTA). For a single person: with the home passing to children, the combined threshold is £500k, leaving £250k chargeable at 40% = £100,000 IHT. Without the RNRB (home to a discretionary trust, sibling, or non-direct-descendant), only the NRB applies: £425k chargeable at 40% = £170,000 IHT. The difference between RNRB qualifying and non-qualifying = £70,000. For a widowed person or surviving spouse using transferred thresholds from a first spouse (tNRB + tRNRB): the combined threshold can reach £1m — fully covering a £750k estate with £0 IHT. This is one of the most commonly misunderstood aspects of IHT planning: a widowed person with a £750k estate can achieve £0 IHT if the transferable thresholds are available and correctly claimed.
The RNRB and why it is critical for £750k estates
The RNRB is the most important threshold for estates in the £500k-£2m range. For a £750k estate: without the RNRB, IHT = £170k; with the RNRB, IHT = £100k — a £70,000 difference. The RNRB (s8D IHTA 1984) requires: (1) the estate includes a 'qualifying residential interest' (QRI) — a property which was the deceased's home at some point (not necessarily immediately before death; any period of residence is sufficient); (2) the QRI 'closely inherits' to a direct lineal descendant (s8K IHTA — biological/adopted/step/foster children, grandchildren, remoter descendants) — either directly by the will, or via an IPDI trust (s8H IHTA). RNRB is NOT automatic even for non-excepted estates — executors must claim it on IHT435. Common mistakes that lose the RNRB: (a) home passes into a discretionary trust (even one for children's benefit) — RNRB LOST; (b) will directs home to a sibling, relative, friend, or charity — RNRB LOST; (c) estate is above £2m ('adjusted net estate' taper threshold — s8E IHTA) — RNRB tapered away (£1 per £2 excess above £2m) but a £750k estate is far below this. For a £750k estate, the RNRB is fully available with no taper. RNRB taper check: £750k adjusted net estate is well below the £2m taper threshold — full £175k RNRB available.
Widowed person with £750k estate — achieving zero IHT
A widowed person with a £750k estate can commonly achieve £0 IHT by using the four combined thresholds: their own NRB (£325k) + the transferred NRB from the deceased first spouse (tNRB — s8A IHTA — up to 100% = £325k) + their own RNRB (£175k) + the transferred RNRB from the first spouse (tRNRB — s8G IHTA — up to 100% = £175k). Total = £1,000,000. A £750k estate is £250k below this combined threshold — £0 IHT. Requirements: (1) first spouse's NRB must have been unused at their death — i.e., their estate passed entirely to the surviving spouse (s18 IHTA) or to charity (s23 IHTA); (2) first spouse's RNRB must have been unused — i.e., their home passed to the surviving spouse (not to children) on their death; (3) the second death's executors must claim both tNRB (IHT402) and tRNRB (IHT436) — neither is automatic; (4) the surviving spouse's home must pass to direct descendants under their will for RNRB and tRNRB to apply. Two critical errors: (a) failing to submit IHT402 and IHT436 — costs the estate up to £200k in unnecessary IHT on a £1m estate, proportionally on a £750k estate, the unclaimed thresholds may cost the executors the difference between £0 and £100k+; (b) first death will contained a discretionary NRB trust (pre-2007 common practice) that used the first NRB — reducing or eliminating the tNRB available on the second death. If an older will contains such a trust: consider whether a deed of variation (s142 IHTA — within 2yr of the first death) would redirect the NRB trust to the surviving spouse and restore the tNRB.
Strategies to reduce IHT below £100k on a £750k single-person estate
If the estate is held by a single person (no surviving spouse; no tNRB available) and the £100k IHT liability (with RNRB) is the starting point, several strategies can reduce or eliminate the IHT: (1) Charitable legacy — 36% reduced rate (s36 IHTA): if the will directs ≥10% of the 'baseline amount' to qualifying charity, the IHT rate drops from 40% to 36%. Baseline = net estate (£750k) - threshold (£500k) = £250k. 10% of £250k = £25k to charity → IHT = 36% × £225k = £81k. Net saving to beneficiaries: £19k. HMRC effectively subsidises 76% of the charitable donation. A percentage-of-residue legacy (e.g., '10% of my estate to Cancer Research UK') is more reliable than a fixed sum, as it always meets the 10% baseline test regardless of how the estate value changes. (2) Lifetime PETs — 7yr clock (s3A IHTA): gifts to individuals during lifetime are PETs. If the donor survives 7 years, the gift falls out of the estate entirely. Example: a £200k gift to children (cash, investments) today = £550k estate; threshold £500k; IHT = 40% × £50k = £20k (if survived 7yr). (3) Annual exemption (s19 IHTA — £3k/yr): certain and immediate; £3k per year per person exempt. Over 10 years = £30k exempt. (4) Normal expenditure from income (s21 IHTA): gifts from surplus income are immediately exempt with no 7yr clock, uncapped. If the person has pension income, investment income, or rental income beyond living expenses, regular gifts from that surplus to children are IHT-exempt immediately. (5) AIM BPR shares (s105(1)(bb) IHTA — 100% BPR after 2yr holding; subject to April 2026 £1m combined BPR/APR cap): placing part of the estate into qualifying AIM shares reduces the chargeable estate. But investment risk applies; AIM shares must be held directly (not in an ISA) for BPR to apply.
Common will planning mistakes that increase IHT on a £750k estate
Several common will drafting or planning mistakes cause a £750k estate to incur more IHT than necessary: (1) NRB discretionary trust in an older will (pre-2007 or pre-2017): many wills drafted before the transferable NRB was introduced in 2007 (or before the RNRB in 2017) contain a 'nil rate band discretionary trust' clause — directing the NRB amount to a discretionary trust on first death. This 'uses up' the NRB on first death, leaving zero tNRB for the surviving spouse's estate. Post-2007, this clause is often unnecessary and harmful. Review pre-2007 wills urgently. If first death has already occurred and the NRB trust is in operation, a deed of variation (s142 IHTA — within 2yr of the first death) can redirect the NRB trust funds to the surviving spouse and restore the tNRB. (2) Home to discretionary trust: if the will directs the family home to a discretionary trust (even for the benefit of children), the RNRB is lost. For a £750k single estate, this costs £70k in additional IHT. For a couple, it costs £140k across both deaths (if both have discretionary trust provisions for the home). (3) Failure to claim tNRB and tRNRB: both are NOT automatic. Executors who do not know about or submit IHT402 (tNRB) and IHT436 (tRNRB) miss the combined transferred thresholds. Solicitors and professional executors are aware of these claims; lay executors often are not. If there is any possibility a spouse left unused NRBs: submit IHT402 and IHT436 as a matter of course. (4) No will at all: dying intestate (without a will) applies the intestacy rules which may not match the deceased's wishes and may not optimise for IHT — e.g., unmarried partners receive nothing under intestacy.
Frequently Asked Questions
How much inheritance tax do I pay on a £750,000 estate?
It depends on who inherits and what thresholds are available. Single person (home to children): NRB £325k + RNRB £175k = £500k threshold; IHT = 40% × £250k = £100,000. Single person (no RNRB — home not to direct descendants): NRB £325k only; IHT = 40% × £425k = £170,000. Widowed person using all four thresholds (tNRB + tRNRB from deceased first spouse + own NRB + own RNRB = £1m combined): IHT = £0 (£750k is below the £1m combined threshold). Married couple (£750k total): first death = £0 (s18 IHTA spousal exemption); second death = £0 if all four thresholds claimed and home passes to direct descendants. Key: the transferred thresholds (tNRB on IHT402 and tRNRB on IHT436) are NOT automatic — executors must claim them. RNRB taper: does not apply to a £750k estate (taper only above £2m adjusted net estate).
Can a married couple avoid all inheritance tax on a £750,000 estate?
Yes — in most cases. First death (all to surviving spouse): £0 IHT (s18 IHTA unlimited spousal exemption); the first spouse's NRB (£325k) and RNRB (£175k) are both preserved as transferable. Second death (surviving spouse, £750k estate): the executors claim NRB £325k + tNRB £325k (IHT402 — NOT automatic) + RNRB £175k + tRNRB £175k (IHT436 — NOT automatic) = £1,000,000 combined threshold. A £750k estate is £250k below this threshold — IHT = £0. Requirements: (1) first death all to spouse (preserving 100% tNRB and tRNRB); (2) IHT402 and IHT436 both submitted on second death; (3) home passes to direct descendants under the surviving spouse's will. Review any older will that contains a 'nil rate band discretionary trust' — this clause may have used up the first NRB, reducing the tNRB available on the second death.
Is the residence nil rate band available on a £750,000 estate?
Yes — the full RNRB (£175k per person) is available on a £750,000 estate. The RNRB taper (s8E IHTA) only applies when the 'adjusted net estate' exceeds £2,000,000. A £750k estate is well below this threshold — no taper; full RNRB available. Requirements: (1) the estate includes a qualifying residential interest (QRI — a property the deceased lived in at some point); (2) the QRI passes to a direct lineal descendant (s8K IHTA — children, grandchildren, step-children, foster children) directly under the will or via an IPDI trust (s8H IHTA). The RNRB must be claimed on IHT435 — it is NOT automatic, even for non-excepted estates. Do not pass the home to a discretionary trust — this loses the RNRB entirely.
How do I reduce inheritance tax on a £750,000 estate?
Several strategies reduce IHT on a £750k estate: (1) Ensure the will is RNRB-optimised: home passes directly to children (or via an IPDI trust — s8H IHTA) — this preserves the RNRB (£175k); IHT falls from £170k to £100k. (2) For widowed persons and couples: claim tNRB (IHT402) and tRNRB (IHT436) from the first spouse — potentially achieving £0 IHT on a £750k estate with combined £1m threshold. (3) Charitable legacy — 36% rate (s36 IHTA): leaving ≥10% of the baseline (£250k) = £25k to charity reduces IHT from 40% to 36%; IHT drops from £100k to £81k. (4) Lifetime PETs (s3A IHTA): gifts to individuals; 7yr clock; if donor survives 7yr, the gift is fully exempt and reduces the estate. (5) Annual exemption (s19 IHTA): £3k per year per person; immediate; certain. (6) Normal expenditure from income (s21 IHTA): gifts from surplus income; uncapped; immediate; no 7yr clock.
What if the £750,000 estate includes a home that is being left to children?
If a £750k estate includes a home being left to children (or grandchildren), the RNRB (£175k) is available — bringing the threshold to £500k and IHT to £100k. Key points: (1) the home can be the only residential property the deceased ever owned — as long as the deceased lived in it at some point; (2) the home can pass directly by will or via an IPDI (Immediate Post-Death Interest) trust for a surviving spouse with remainder to children (s8H IHTA allows RNRB for IPDI structures); (3) the home CANNOT pass via a discretionary trust and retain the RNRB — this is a fundamental planning point. If a pre-2017 will leaves the home to a discretionary trust, consider whether a deed of variation (within 2yr of death, s142 IHTA) could redirect the home directly to the children to restore the RNRB. RNRB claim: IHT435 — NOT automatic; must be submitted with the IHT400.
The Right Will Structure Could Save £100k IHT on a £750k Estate
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